摘要
本文利用ＪＸＡ８８００Ｍ超大型电子探针，以湖南黄金洞金矿含金毒砂为研究对象。利用金特征Ｘ射线扫描方法和微区金含量，对不可见金赋存状态的研究方法和测试条件进行了探索。先观察背散射电子图像，排除金在含金矿物毒砂中呈显微颗粒存在的可能性，继而用ＬｉＦ晶体测定金Ｌ＝８８．７６Ｌａｌ峰位，然后逐渐放大倍数（×３００、×１０００、×５０００、×３００００、×２０００００）进行金特征Ｘ射线连续测量，结果发现金元素总是均匀分布在毒砂中，从而证实了金呈品格金形式存在的推测。
This paper studies the mode of gold in arsenopyrite (Asp) of Huangjindong gold deposit, Hunan Province. The special X ray scanning is applied to approach the existing state of invisible gold in Asp, and analysis condition is investigated. Back scatter electron image is firstly used to determine whether grain gold occurs, then, using LIF crystal for measurement of AuL=88 76 Lαl peak. The selected Au bearing Asp (without visible gold) is continuously analyzed by means of special X ray at increasing magnification(×300、×1000、×5000、×30000、 ×200000 )。It is found that gold element always evenly distributes in Asp. The result suggests that gold exists as lattice Au mode in arsenopyrite.
出处
《高校地质学报》
CAS
CSCD
1997年第3期256-262,共7页
Geological Journal of China Universities
基金
国家黄金管理局地质科研资助
关键词
金矿矿物
毒砂
金
赋存状态
电子探针
Au bearing arsenopyrite, EPA special X ray, existing state of gold, lattice gold.
